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Renesas HZ33-3LTD-E
- Part No.:
- HZ33-3LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
HZ33-3LTD-E.pdf
- Description:
- DIODE ZENER 33V 400MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
HZ33-3LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog and stabilized power supply circuits, with a nominal zener voltage of 33.2–34.6 V at 0.5 mA test current, 250 Ω dynamic impedance, 400 mW power dissipation, and DO-35 glass package suitable for through-hole mounting in industrial instrumentation and sensor signal conditioning.
For engineers reviewing the HZ33-3LTD-E datasheet, HZ33-3LTD-E pinout, HZ33-3LTD-E application, or HZ33-3LTD-E equivalent, key selection criteria include zener voltage tolerance (±2.1% at 33.9 V nominal), low noise performance (≈1/3–1/10 of standard HZ series), temperature coefficient (−0.04 %/°C typical), and compliance with Renesas Standard quality grade for office equipment and industrial robots.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a silicon planar junction, with specified reverse current ≤1 μA at VR = 27 V and dynamic resistance measured at IZ = 0.5 mA DC. Its low-noise design targets applications requiring minimal voltage fluctuation under varying load or thermal conditions.
The HZ33-3LTD-E exhibits a negative temperature coefficient of −0.04 %/°C (≈−13.6 mV/°C) near 33.9 V, enabling predictable drift compensation in multi-stage references. It is rated for junction temperatures up to 175°C and storage from −55°C to +175°C, supporting operation in extended industrial ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33.2–34.6 V at IZ = 0.5 mA - defines stable regulation point for mid-range voltage references |
| Dynamic Resistance (rd) | 250 Ω max at IZ = 0.5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous DC power handling before thermal derating |
| Reverse Leakage Current | ≤1 μA at VR = 27 V - ensures minimal standby current in high-impedance bias networks |
| Temperature Coefficient | −0.04 %/°C typical - enables predictable voltage drift compensation in temperature-stable designs |
| Junction Temperature (Tj) | 175°C max - supports reliable operation in thermally constrained PCB layouts |
| Package | DO-35 glass axial - provides hermetic sealing, proven reliability, and compatibility with legacy through-hole assembly |
Pinout & Package
DO-35 glass axial package with cathode band marking; body color orange; mass ≈0.13 g; dimensions per JEITA code GRZZ0002ZB-A (L = 26.0 mm, φD = 2.0 mm, E = 4.2 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference terminal | Connected to regulated positive rail; polarity must be observed to maintain reverse-bias operation |
| 2 (Anode) | Low-side reference terminal | Typically tied to ground or common return; completes bias path for zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise performance | Diode noise level ≈1/3–1/10 that of standard HZ series - reduces RMS voltage ripple in sensitive analog front-ends |
| Stable zener impedance | 250 Ω max at 0.5 mA - ensures consistent regulation across production lots and temperature |
| Wide zener voltage range | 33.2–34.6 V tolerance window - accommodates ±2.1% variation while maintaining functional margin |
| Hermetic DO-35 packaging | JEITA GRZZ0002ZB-A compliant - guarantees long-term parameter stability in humid or chemically active environments |
| Standard quality grade | Rated for industrial robots and test equipment - validated for non-safety-critical, non-life-support applications |
Applications
| Industrial Sensor Signal Conditioning | Precision Analog Reference Supply |
|---|---|
Use Scenario: Stabilizing excitation voltage for strain gauge bridges in factory-floor load cells. IC Role / Device Role / Timing Role: Two-terminal voltage reference providing fixed bias point for ratiometric measurement circuits. Use Value: Low 250 Ω dynamic impedance minimizes gain error from bridge current variation; low noise prevents corruption of microvolt-level differential outputs. | Use Scenario: Generating a clean 33.9 V reference for 16-bit SAR ADC driver stages in automated test equipment. IC Role / Device Role / Timing Role: Passive voltage reference source establishing absolute scale for analog-to-digital conversion. Use Value: −0.04 %/°C tempco enables <±0.1% drift over 0–70°C ambient; DO-35 hermeticity prevents long-term parameter shift in sealed instrument enclosures. |
| Stabilized Power Supply Feedback | Overvoltage Protection Clamp |
Use Scenario: Setting regulation threshold in linear post-regulator stage for FPGA core voltage supplies. IC Role / Device Role / Timing Role: Zener element in shunt feedback loop controlling error amplifier output. Use Value: 400 mW power rating allows safe dissipation during transient overload; tight 33.2–34.6 V window ensures accurate trip point without external trimming. | Use Scenario: Clamping surge-induced transients on 24 V industrial control bus lines. IC Role / Device Role / Timing Role: Passive crowbar element limiting peak voltage to protect downstream logic inputs. Use Value: Fast avalanche response (<10 ns) and 250 Ω impedance limit clamping overshoot; DO-35 robustness withstands repeated surge events per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4747A | Zener voltage 20 V nominal, 200 Ω rd, 1 W Pd, DO-41 package | Higher power, lower voltage - suited for general-purpose 20 V regulation, not 33.9 V precision reference | Select only if system requires higher power headroom and can accommodate wider voltage tolerance (±5%) |
| BZX85C33 | Zener voltage 33 V nominal, 350 Ω rd, 1.3 W Pd, DO-41 package | Higher power but higher impedance and no low-noise specification - acceptable for non-critical clamping, not low-noise references | Choose when cost or availability outweighs noise and tempco requirements; verify thermal derating in compact layouts |
Compared with HZ33-3LTD-E, the 1N4747A offers higher power but lacks low-noise optimization and precise 33.9 V targeting, while BZX85C33 matches voltage closely but trades 40% higher dynamic impedance and unspecified noise performance - making HZ33-3LTD-E uniquely suited for metrology-grade analog references.
Availability
HZ33-3LTD-E is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, precision analog reference supply, and stabilized power supply feedback requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.
Supply support for HZ33-3LTD-E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and SoC solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series is part of Renesas' discrete analog portfolio, designed specifically for low-noise, stable voltage reference applications in test equipment, industrial automation, and precision instrumentation where parameter consistency and long-term reliability are critical.
FAQ
What is the exact zener voltage range for HZ33-3LTD-E at 0.5 mA test current?
The HZ33-3LTD-E has a guaranteed zener voltage range of 33.2 V to 34.6 V when tested at IZ = 0.5 mA DC, corresponding to a nominal value of 33.9 V with ±2.1% tolerance. This range is verified per Renesas REJ03G0182-0300 Rev.3.00 and applies strictly to the HZ33-3LTD-E variant within the HZ-L Series.
Does HZ33-3LTD-E meet RoHS compliance requirements?
Yes, HZ33-3LTD-E complies with the EU RoHS Directive as confirmed by Renesas Electronics' environmental documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) above threshold limits, and is suitable for use in environmentally regulated industrial electronics.
What is the maximum allowable reverse current before breakdown for HZ33-3LTD-E?
The HZ33-3LTD-E specifies a maximum reverse leakage current of 1 μA at VR = 27 V, measured at Ta = 25°C. This value ensures minimal standby power loss in high-impedance bias networks and confirms stable pre-breakdown behavior well below its 33.2 V zener onset.
Can HZ33-3LTD-E be used in automotive applications?
No, HZ33-3LTD-E is classified as a Renesas Standard quality grade device, intended for computers, office equipment, industrial robots, and test equipment - not for automotive or safety-critical systems. It lacks AEC-Q200 qualification and is not approved for transportation equipment or anti-crime/safety systems per Renesas quality grading policy.
How does the noise performance of HZ33-3LTD-E compare to standard Zener diodes?
HZ33-3LTD-E delivers approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners, as stated in Renesas' HZ-L Series datasheet. This low-noise characteristic stems from optimized silicon planar junction processing and is critical for applications like precision ADC references and low-level sensor excitation where voltage ripple directly impacts measurement fidelity.
HZ33-3LTD-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±2.12%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 250 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 30 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
HZ33-3LTD-E FAQ
1.How can I place an order for HZ33-3LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ33-3LTD-E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HZ33-3LTD-E reliable?
The price and inventory of HZ33-3LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ33-3LTD-E is usually 5 days.
3.What payment methods are accepted for HZ33-3LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ33-3LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ33-3LTD-E?
HZ33-3LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ33-3LTD-E order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HZ33-3LTD-E?
For technical support, including HZ33-3LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ33-3LTD-E requirements.
6.How does Aetrix verify that HZ33-3LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ33-3LTD-E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HZ33-3LTD-E meets industry standards.
7.What is the process for return or replacement of HZ33-3LTD-E?
All HZ33-3LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ33-3LTD-E, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HZ33-3LTD-E part is unused and in its original packaging.
Return procedure for HZ33-3LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ33-3LTD-E Tags
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MM5Z5V1ST1G
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